<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>美女帅哥走一走</title>
</head>

<body>
  <div id="app">
    <ul>
      <li v-for="(item,index) in dataList">
        {{item.content}}
      </li>
    </ul>
    <button @click="updata">走一走</button>
  </div>
  <script src="../js/vue.js"></script>
  <script>
    const app = new Vue({
      el: "#app",
      data: {
        dataList: [
          { id: 1, content: "美女" },
          { id: 2, content: "帅哥" },
          { id: 3, content: "程序员" },
        ],
      },
      methods: {
        updata() {
          const a = this.dataList.shift()
          this.dataList.push(a)
        }
      }

    });
  </script>
</body>

</html>